Hi,
upper left "CP User" click
Left column scroll down to "pictures and albums" click
This will open page to your albums.
Select an album you want to delete the pics from click it
Then in the upper right under the page number, you have the choice of
edit album / edit pics
select "edit pics"
Then it will show the description box on the left and center with each pic under the bar that lists the album choices
there are little letters for "delete this photo" and a box - select the boxes of photos to delete
and scroll ALL the way to the bottom and click the box that says "save changes"